diff --git a/compiler/tests/org/jetbrains/jet/jvm/compiler/AbstractLoadCompiledKotlinTest.java b/compiler/tests/org/jetbrains/jet/jvm/compiler/AbstractLoadCompiledKotlinTest.java
index ed8eb9c9a49..19631ba17bb 100644
--- a/compiler/tests/org/jetbrains/jet/jvm/compiler/AbstractLoadCompiledKotlinTest.java
+++ b/compiler/tests/org/jetbrains/jet/jvm/compiler/AbstractLoadCompiledKotlinTest.java
@@ -67,7 +67,7 @@ public abstract class AbstractLoadCompiledKotlinTest extends TestCaseWithTmpdir
 
         for (DeclarationDescriptor descriptor : namespaceFromClass.getMemberScope().getAllDescriptors()) {
             if (descriptor instanceof ClassDescriptor) {
-                assert descriptor instanceof DeserializedClassDescriptor : DescriptorUtils.getFQName(descriptor);
+                assert descriptor instanceof DeserializedClassDescriptor : DescriptorUtils.getFQName(descriptor) + " is loaded as " + descriptor.getClass();
             }
         }